1. Youth on the Road: Reflections on the History of Tramping;Alder;Annals of Tourism Research,1985
2. The New Grand Tour: Travelling Today through Europe, Asia Minor, India and Nepal;Alderson,1971
3. The Nature of Youth Tourism: Motivations, Characteristics and Requirements;Aramberri,1991
4. Market Segmentation Studies Asia Europe Japan;Australian Tourist Commission,1993
5. Alternative Tourism: Pious Hope or Trojan Horse;Butler;Journal of Travel Research,1990